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SectorC: A C Compiler in 512 bytes

https://xorvoid.com/sectorc.html
81•valyala•4h ago•16 comments

Brookhaven Lab's RHIC concludes 25-year run with final collisions

https://www.hpcwire.com/off-the-wire/brookhaven-labs-rhic-concludes-25-year-run-with-final-collis...
23•gnufx•2h ago•15 comments

The F Word

http://muratbuffalo.blogspot.com/2026/02/friction.html
34•zdw•3d ago•4 comments

Software factories and the agentic moment

https://factory.strongdm.ai/
86•mellosouls•6h ago•164 comments

I write games in C (yes, C)

https://jonathanwhiting.com/writing/blog/games_in_c/
129•valyala•3h ago•98 comments

Speed up responses with fast mode

https://code.claude.com/docs/en/fast-mode
45•surprisetalk•3h ago•51 comments

Hoot: Scheme on WebAssembly

https://www.spritely.institute/hoot/
142•AlexeyBrin•9h ago•26 comments

Stories from 25 Years of Software Development

https://susam.net/twenty-five-years-of-computing.html
95•vinhnx•6h ago•13 comments

OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
850•klaussilveira•23h ago•256 comments

First Proof

https://arxiv.org/abs/2602.05192
66•samasblack•6h ago•51 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
1090•xnx•1d ago•618 comments

Al Lowe on model trains, funny deaths and working with Disney

https://spillhistorie.no/2026/02/06/interview-with-sierra-veteran-al-lowe/
62•thelok•5h ago•9 comments

Reinforcement Learning from Human Feedback

https://rlhfbook.com/
93•onurkanbkrc•8h ago•5 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
229•jesperordrup•14h ago•80 comments

Start all of your commands with a comma (2009)

https://rhodesmill.org/brandon/2009/commands-with-comma/
515•theblazehen•3d ago•190 comments

We mourn our craft

https://nolanlawson.com/2026/02/07/we-mourn-our-craft/
331•ColinWright•3h ago•390 comments

Selection Rather Than Prediction

https://voratiq.com/blog/selection-rather-than-prediction/
13•languid-photic•3d ago•4 comments

Show HN: A luma dependent chroma compression algorithm (image compression)

https://www.bitsnbites.eu/a-spatial-domain-variable-block-size-luma-dependent-chroma-compression-...
3•mbitsnbites•3d ago•0 comments

Coding agents have replaced every framework I used

https://blog.alaindichiappari.dev/p/software-engineering-is-back
253•alainrk•8h ago•409 comments

The AI boom is causing shortages everywhere else

https://www.washingtonpost.com/technology/2026/02/07/ai-spending-economy-shortages/
181•1vuio0pswjnm7•10h ago•250 comments

France's homegrown open source online office suite

https://github.com/suitenumerique
609•nar001•8h ago•269 comments

72M Points of Interest

https://tech.marksblogg.com/overture-places-pois.html
35•marklit•5d ago•6 comments

Show HN: I saw this cool navigation reveal, so I made a simple HTML+CSS version

https://github.com/Momciloo/fun-with-clip-path
26•momciloo•3h ago•5 comments

A Fresh Look at IBM 3270 Information Display System

https://www.rs-online.com/designspark/a-fresh-look-at-ibm-3270-information-display-system
47•rbanffy•4d ago•9 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
124•videotopia•4d ago•37 comments

Where did all the starships go?

https://www.datawrapper.de/blog/science-fiction-decline
95•speckx•4d ago•103 comments

History and Timeline of the Proco Rat Pedal (2021)

https://web.archive.org/web/20211030011207/https://thejhsshow.com/articles/history-and-timeline-o...
20•brudgers•5d ago•5 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
210•limoce•4d ago•117 comments

Show HN: Kappal – CLI to Run Docker Compose YML on Kubernetes for Local Dev

https://github.com/sandys/kappal
32•sandGorgon•2d ago•15 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
286•isitcontent•1d ago•38 comments
Open in hackernews

Visualizing quaternions: An explorable video series (2018)

https://eater.net/quaternions
85•uncircle•6mo ago

Comments

dang•5mo ago
Related. Others?

Visualizing quaternions (2018) - https://news.ycombinator.com/item?id=38043644 - Oct 2023 (42 comments)

Visualizing quaternions: an explorable video series (2018) - https://news.ycombinator.com/item?id=31083042 - April 2022 (15 comments)

Visualizing quaternions: An explorable video series - https://news.ycombinator.com/item?id=18310788 - Oct 2018 (32 comments)

gnabgib•5mo ago
Show HN: Visualizing the math that powers 3D character animation (238 points, 2022, 53 comments) https://news.ycombinator.com/item?id=31724613
calebm•5mo ago
Wow, this is very cool.
JKCalhoun•5mo ago
Very cool.

On MacOS: no audio on Safari, worked in Chrome though.

I was odd to me to see that Ben Eater was involved. His talents are broad.

srean•5mo ago
Questions for mathematicians out here.

Is there such a thing as quaternion analysis -- calculus of functions from quaternions to quaternions.

What would be their key theorems ? What would be the analogue of conformal mappings, if any ?

Any book recommendations would be gratefully appreciated.

Koshkin•5mo ago
I am not familiar with this area, but see, e.g. https://link.springer.com/book/10.1007/978-3-0348-0622-0

There are also these notes: https://www.geometrictools.com/Documentation/Quaternions.pdf

srean•5mo ago
Thanks a bunch
xeonmc•5mo ago
A quaternion encodes uniform scaling + rotation. The logarithm of a quaternion is its axis-angle-nepers form, and vice versa.

    quat = sqrt( exp( nepers + radians * <axis> ) )
So I think with this exponential map, the rest of its calculus can be extended from that.
srean•5mo ago
Heard the word 'nepers' after many decades. Are you by any chance an Electrical major ?

Thanks for your comment. To be fair, I had not done due diligence before asking. There's a Wikipedia pages on quaternion calculus.

Complex analysis (calculus on functions from 2D rotations to 2D rotations) is beautiful -- Once differentiability guarantees infinite differentiability. Wondering what would the analogue of that be for quaternions

jacobolus•5mo ago
Conformal mappings are not nearly as rich in >2 dimensions. There is a much stronger rigidity constraint and you end up limited to just Möbius transformations. The 2 dimensional case is special.

See: https://en.wikipedia.org/wiki/Liouville's_theorem_(conformal...

srean•5mo ago
Yes of course, but I am curious about any interesting structures that functions from quaternion to quaternion may possess. I used conformal mapping as an example of an interesting structure. I could have used Cauchy Riemann as another example.
jacobolus•5mo ago
You're probably looking for something like Sudbery 1977,

https://dougsweetser.github.io/Q/Stuff/pdfs/Quaternionic-ana...

(published 1979, doi: 10.1017/S0305004100055638)

srean•5mo ago
Fantastic. Thanks for the reference.